1)   Machinist MathGuru 1.0.90
Solve common trade maths problems in a whiz with Machinist's Math Guru software. This inexpensive, easy to use utility is designed primarily for students, machinists, toolmakers and CNC programmers.
machinist, trig, trigonometry, bolt circle, triangle, speeds and feeds, feeds and speeds, chord, drill charts, tap drills,

 2)   Machinist Calculator 5.0.38
Machinist Calculator has been developed to quickly solve common machine shop math problems such as trigonometry, speeds and feeds, bolt circles, and much more. Get your free demo now.
trigonometry, trig, machinist, speeds feeds, speeds, bolt circle,